Oddity learning as a function of mental age

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“Mentally defective (139) and normal (40) children, grouped according to MA, were tested on a form-oddity problem. The Ss were given 200 trials or carried to a criterion of 20 successive correct responses on the three-choice task, with finding a marble hidden under the odd object as an incentive. The results showed that defectives with an MA of approximately 4 years do not make appreciable progress on the task, with only 15% ”solving“ it. Groups with MAs of 6.1, 7.7, and 9.7 years show rather typical negatively accelerated performance curves, increasing in elevation and degree of bow with increases in MA. The normal Ss attain final performance levels comparable to those of defectives with equivalent MAs, though the curves tend toward rectilinearity. A need for further research comparing defective and normal children with equivalent MAs is indicated by these findings.” From Psyc Abstracts 36:01:1EN28E. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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